Dear hannahsnana: It is impossible to guess, over the internet, as to the cause of your abdominal pain. Is is
muscularBecker's muscular dystrophy
Duchenne muscular dystrophy
Muscular dystrophy
Muscular dystrophy - resources or GI related, for example? It could be that you have some scar tissue. Scar tissue can feel very tight. You might check with your plastic surgeon to see if there are exercises he/she recommends to help loosen scar tissue. Also, if the pain is severe and/or constant, it should be evaluated by a physician to determine the cause and, if applicable, proper treatment.